i just came back from the range.
60.0gr of IMR 4831 shot real good for me with 154sst. the two groups are both at .5 center to center. R-P cases and a 215 primer.

With 4 different powder combo's I could not get the 154 SST's to work in my M70 super grade.

my buddy's rifle would shoot them well. i think i lucked out a bit and got a good one right of the bat. the same bullet with RL 22 was nearly 2 inches .